Expansion Chucking Device

Abstract

The present invention relates to an expansion chucking device having: a base body ( 2 ); an expansion sleeve ( 4 ) provided at an axial end region of the base body ( 2 ), which sleeve forms a central receptacle ( 5 ) for a component to be chucked; and a chucking ring ( 6 ) that surrounds the expansion sleeve ( 4 ), forming an annular pressure chamber ( 7 ) located therebetween, and is thread-joined to the base body ( 2 ), the pressure chamber ( 7 ) being filled with a hydraulic medium ( 11 ) and the expansion sleeve ( 4 ) being capable of being elastically deformed in order to secure a component in the receptacle ( 5 ) by the fact that the chucking ring ( 6 ) is axially displaced by rotation with respect to the base body ( 2 ), with a reduction in the volume of the pressure chamber ( 7 ), wherein multiple slits ( 4 b ) are embodied in the expansion sleeve ( 4 ) which extend in the axial direction and are spaced apart from one another when viewed in the circumferential direction, the expansion sleeve ( 4 ) being sealed off with respect to the pressure chamber ( 7 ) in order to prevent any entry of hydraulic medium ( 11 ) into the slits ( 4 a ).

1 . An expansion chucking device having: a base body ( 2 ); an expansion sleeve ( 4 ) provided at an axial end region of the base body ( 2 ), which sleeve forms a central receptacle ( 5 ) for a component to be chucked; and a chucking ring ( 6 ) that surrounds the expansion sleeve ( 4 ), forming an annular pressure chamber ( 7 ) located therebetween, and is thread-joined to the base body ( 2 ), the pressure chamber ( 7 ) being filled with a hydraulic medium ( 11 ) and the expansion sleeve ( 4 ) being capable of being elastically deformed in order to secure a component in the receptacle ( 5 ) by the fact that the chucking ring ( 6 ) is axially displaced by rotation with respect to the base body ( 2 ), with a reduction in the volume of the pressure chamber ( 7 ), 
 wherein multiple slits ( 4   b ) are embodied in the expansion sleeve ( 4 ) which extend in the axial direction and are spaced apart from one another when viewed in the circumferential direction, the expansion sleeve ( 4 ) being sealed off with respect to the pressure chamber ( 7 ) in order to prevent any entry of hydraulic medium ( 11 ) into the slits ( 4   a ).    
   
   
       2 . An expansion chucking device having: a base body ( 2 ); an expansion sleeve ( 4 ) provided at one axial end region of the base body ( 2 ); and a chucking ring ( 6 ) that engages into the expansion sleeve ( 4 ), forming an annular pressure chamber ( 7 ) located therebetween, and is thread-joined to the base body ( 2 ), the pressure chamber ( 7 ) being filled with a hydraulic medium ( 11 ) and the expansion sleeve ( 4 ) being capable of being elastically deformed in order to secure a component on the expansion sleeve ( 4 ) by the fact that the chucking ring ( 6 ) is axially displaced by rotation with respect to the base body ( 2 ), with a reduction in the volume of the pressure chamber ( 7 ), 
 wherein multiple slits ( 4   b ) are embodied in the expansion sleeve ( 4 ) which extend in the axial direction and are spaced apart from one another when viewed in the circumferential direction, the expansion sleeve ( 4 ) being sealed off with respect to the pressure chamber ( 7 ) in order to prevent any entry of hydraulic medium ( 11 ) into the slits ( 4   a ).    
   
   
       3 . The expansion chucking device according to  claim 1 , wherein an intermediate sleeve ( 13 ) is provided for sealing of the expansion sleeve ( 4 ) with respect to the pressure space ( 7 ).  
   
   
       4 . The expansion chucking device according to  claim 3 , wherein the intermediate sleeve ( 13 ) is secured to the base body ( 2 ) and/or to the expansion sleeve ( 4 ).  
   
   
       5 . The expansion chucking device according to  claim 1 , wherein the axial slits ( 4   b ) are closed at their two axial ends.  
   
   
       6 . The expansion chucking device according to  claim 1 , wherein the pressure chamber ( 7 ) is sealed at its end facing toward the base body ( 2 ), by way of a sealing ring ( 14 ) made of plastic, against any emergence of hydraulic medium.  
   
   
       7 . The expansion chucking device according to  claim 1 , wherein the pressure chamber ( 7 ) is filled with an elastic solid body ( 11 ) as a hydraulic medium.  
   
   
       8 . The expansion chucking device according to  claim 7 , wherein a sliding ring element ( 12 ) is arranged between the elastic solid body ( 11 ) and a pressure surface ( 6   a ) of the chucking ring ( 6 ) in order to transfer an axial compressive force from the chucking ring ( 6 ) to the solid body ( 11 ).  
   
   
       9 . The expansion chucking device according to  claim 8 , wherein the sliding ring element ( 12 ) possesses a sealing function.  
   
   
       10 . The expansion chucking device according to  claim 7 , wherein the solid body ( 11 ) comprises multiple annular elements ( 11   a ,  11   b ,  11   c ,  11   d ) arranged to lie next to one another.  
   
   
       11 . The expansion chucking device according to  claim 7 , wherein the pressure chamber ( 7 ) possesses a substantially constant inside and/or outside diameter.  
   
   
       12 . The expansion chucking device according to  claim 1 , wherein the slits ( 4   b ) are regularly spaced apart from one another when viewed in the circumferential direction of the expansion sleeve ( 4 ).